Descriere produs

AJ-SR04M este un modul care masoara distanta folosind ultrasunete, 40KHz .
Modulul este rezistent la apa ( waterproof ), are un consum redus, si este usor de folosit.
​Cod exemplu

// Define Trig and Echo pin:
#define trigPin 2
#define echoPin 3
// Define variables:
long duration;
int distance;
void setup() {
  // Define inputs and outputs
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  
  // Begin Serial communication at a baudrate of 9600:
  Serial.begin(9600);
}
void loop() {
  // Clear the trigPin by setting it LOW:
  digitalWrite(trigPin, LOW);
  
  delayMicroseconds(5);
 // Trigger the sensor by setting the trigPin high for 10 microseconds:
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  
  // Read the echoPin. pulseIn() returns the duration (length of the pulse) in microseconds:
  duration = pulseIn(echoPin, HIGH);
  
  // Calculate the distance:
  distance = duration*0.034/2;
  
  // Print the distance on the Serial Monitor (Ctrl+Shift+M):
  Serial.print("Distance = ");
  Serial.print(distance);
  Serial.println(" cm");
  
  delay(100);
}